47
W&T
Subject to error and alteration
USB Interfaces
Wiring examples
RS232 wiring example with hardware handshake
RS232 wiring example with software handshake
DB25 male DTE
DB9 male DTE
TxD
RxD
GND
RTS
CTS
DSR
DCD
DTR
RI
PC
3
2
7
5
4
20
8
6
RxD
TxD
GND
CTS
RTS
DTR
DCD
DSR
38001
3
2
5
7
8
6
1
4
9
USB
USB
DTE Device
2
3
7
4
5
6
8
20
22
DB9 male DTE
DB25 male DCE
TxD
RxD
GND
RTS
CTS
DSR
DCD
DTR
RI
TxD
RxD
GND
PC
DCE Device
2
3
7
38001
3
2
5
7
8
6
1
4
9
USB
USB
DB9 male DTE
DB25 male DTE
TxD
RxD
GND
RTS
CTS
DSR
DCD
DTR
RI
RxD
TxD
GND
PC
DTE Device
3
2
7
38001
3
2
5
7
8
6
1
4
9
USB
USB
DB9 male DTE
DB25 female DCE
TxD
RxD
GND
RTS
CTS
DSR
DCD
DTR
RI
TxD
RxD
GND
RTS
CTS
DSR
DCD
DTR
RI
PC
DCE Device
38001
3
2
5
7
8
6
1
4
9
USB
USB